Getting the gold permit is the relatively easy part, provided you can find something unclaimed in the area you want to be in. Bare in mind, or should it be Beer in Hand, this will depend largely on how u propose to work it, and what u propose in your works programme.
I got a suction dredge claim processed on the Arrow River without to many hassles from Crown Minerals, but the more difficult step is then getting all your access arrangements sorted, and if required resource consents.
Fortunately the district plans in our area allow for suction dredge mining, with up to a 6" dredge and 10 HP motor, so Resource Consent was a non issue for my proposal.
Gaining the access aggreements from afected parties wasnt to complicated, but did take time, so be prepared for DOC or LINZ to takes months upon months.